Thank you so much! They do indeed look like a set since the drop and stud of the earring match the center stones of the bracelet. Unless it's due to magnification of the photos, those are major diamonds and absolutely beautiful.

Ye, they are surely a set, so maybe there are other pieces. Rarely a set is composed by a bracelet and a pair of earrings, generally there's also a matching necklace or pendant and maybe a ring. Let's hope I'm right and we could see them soon!

I seem to recall that it was pointed out that Kate was wearing, at the Bafta event, jewelry lent/given to her by the Queen. Am I totally dreaming this? I had thought it was the bracelet ......

You are absolutely correct!!!
The bracelet and earrings worn to the BAFTA event were a loan from the Queen. The earrings worn here are not the same!
The bracelet does appear to be however, but I doubt that the it is en suite with the earrings.

Earrings and bracelet worn by the Duchess of Cambridge at the private dinner held at Clarence House in aid of one of the Prince of Wales's charities, In Kind Direct. She was standing in for the Prince (who was attending the funeral of Crown Prince Sultan of Saudi Arabia) and this was her first official "solo" event.

Links to images showing Catherine wearing the jewels have been posted previously. As the threads in RJOTWMB are not permanently retained as they are here at TRF, such links will eventually fail.

-> For the record, here are two thumbnail direct attachments of the earrings and bracelet worn by the Duchess at the In Kind Direct event.
The images have been cropped from much larger pictures posted by, and courtesy of Tamara at RJOTWMB. Due to their highly-cropped nature the images are not subject to copyright.

Wouldn't it be nice if a list of the wedding gifts was released? Doubt that'll happen, though.

Iīve heard that the couple didnīt want to receive wedding gifts but asked the guests to donate to charity instead. A nice gesture IMO,but I am sure their parents or close friends gave them something- itīs a beautiful tradition to give presents to newly-weds,usually women get a lot of stuff for cooking and housekeeping and some dresses,jewellery etc.
(When Princess Diana and Charles got married,they received a lot of presents from other Royal families and fans from all over the world,they were also shown to the public.)

As she is wearing them now more often, I think it is secure to assume these are her own. So maybe really a wedding gift.
Although they look more like e.g. Art Deco pieces, I am not quite convinced. Maybe something new, designed in a classical way.

Kate is definitely understated and minimal when it comes to wearing jewelry, but I'm really pleased she wore the earrings and bracelet set to the charity dinner. What matters is quality, not quantity. I don't know how much we'll be seeing her wear the other pieces that she's entitled to in the future, but I sometimes get the distinct feeling that many of us would love to dip into the royal jewel vault more than she would! But I guess we'll just have to see what she wears as time goes on.